Tumor (IMAGE) Rockefeller University Caption A mouse lung with metastases (green) formed by cancer cells that spread from a primary breast tumor. Credit Laboratory Of Systems Cancer Biology at The Rockefeller University Usage Restrictions Image may be used to illustrate research described in the accompanying release. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.